(function(){ if(typeof window==='undefined')return; // Base64 character set var B64='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='; // Pure JS base64 encode - no native btoa dependency function pureJsBtoa(input){ var str=input==null?'':String(input); var bytes; // Convert to UTF-8 bytes if(typeof TextEncoder!=='undefined'){ bytes=new TextEncoder().encode(str); }else{ var utf8=unescape(encodeURIComponent(str)); bytes=[]; for(var i=0;i>2; var c2=((b1&3)<<4)|(b2>>4); var c3=((b2&15)<<2)|(b3>>6); var c4=b3&63; result+=B64[c1]+B64[c2]; result+=hasB2?B64[c3]:'='; result+=hasB3?B64[c4]:'='; } return result; } // Pure JS base64 decode - no native atob dependency function pureJsAtob(input){ var str=input==null?'':String(input).replace(/[=]+$/,''); var bytes=[]; var len=str.length; for(var i=0;i>4)); if(c3>=0)bytes.push(((c2&15)<<4)|(c3>>2)); if(c4>=0)bytes.push(((c3&3)<<6)|c4); } // Decode UTF-8 bytes to string if(typeof TextDecoder!=='undefined'){ return new TextDecoder('utf-8',{fatal:false}).decode(new Uint8Array(bytes)); }else{ var str=''; for(var j=0;j

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